diff --git a/share/man/man9/style.9 b/share/man/man9/style.9
index 174acf8d6aa2..d69948100d45 100644
--- a/share/man/man9/style.9
+++ b/share/man/man9/style.9
@@ -58,6 +58,16 @@ is silent on an issue.
  */
 .Ed
 .Pp
+The copyright header should be a muli-line comment, with the first
+line of the comment having a dash after the star like so:
+.Bd -literal
+/*-
+ * Copyright 1942 M. Warner Losh.  All Rights Reserved.
+ *
+ * Long, boring license goes here, but redacted for brevity
+ */
+.Ed
+.Pp
 After any copyright header, there is a blank line, and the
 .Va rcsid
 for source files.